GrainGenes Reference Report: PBR-123-128
Reference
PBR-123-128
Title
Evaluation of cultivated barley (Hordeum vulgare) germplasm for the presence of thermostable alleles of beta-amylase
Journal
Plant Breeding
Year
2004
Volume
123
Pages
128-131
Author
Malysheva L Ganal MW Roder MS
Abstract
Summary: A cleaved amplified polymorphic sequence marker was used to detect the alleles Bmy-Sd2H and Bmy-Sd3 identifying highly thermostable isoforms of the enzyme beta-amylase, which improves fermentability during brewing. Among the 889 accessions of barley (Hordeum vulgare) investigated, and two accessions of H. spontaneum a total of 166 accessions were identified carrying the superior beta-amylase alleles. These thermostable alleles of beta-amylase were most frequently observed in six-rowed varieties originating from Asia, especially Japan, with 61.9% of the accessions from Asia carrying the alleles of interest. Additional six-rowed barleys carrying the relevant alleles were identified among accessions from America, Africa and the Near East. In the European varieties, the percentage of accessions with the alleles of interest was 5.1% with a strong predominance in two-rowed spring barleys. A pedigree analysis identified the cross 'Binder' x 'Gull' as the main source of the thermostable beta-amylase alleles in European varieties. The data suggest that an improvement of malting quality in barley could be achieved by introduction of the Bmy1-Sd2H and Bmy1-Sd3 alleles into the European breeding programmes
Keyword
accessions
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GrainGenes Reference Report: PBR-123-128
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||